import router from './router'
import store from './store'
import {Message} from 'element-ui'
import NProgress from 'nprogress' // 页面顶部进度条
import 'nprogress/nprogress.css' // 页面顶部进度条样式
import {getToken} from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title' // 页面标题

NProgress.configure({showSpinner: false}) // NProgress Configuration

// no redirect whitelist
const whiteList = ['/login',"/register"]
// must has Token URL list
const mustHasTokenList = ['/cart']

router.beforeEach(async (to, from, next) => {
    // start progress bar
    NProgress.start()

    // set page title
    document.title = getPageTitle(to.meta.title)

    // determine whether the user has logged in
    const hasToken = getToken()

    /* has token*/
    if (hasToken) {
        if (to.path === '/login' || to.path === '/register') {
            // if is logged in, redirect to the home page
            next({path: '/'})
            NProgress.done()
        }
        else {
            const hasGetUserInfo = store.getters.name
            if (hasGetUserInfo) {
                next()
            }
            else {
                try {
                    // get user info
                    await store.dispatch('user/getInfo')

                    next()
                }
                catch (error) {
                    // remove token and go to login page to re-login
                    await store.dispatch('user/resetToken')
                    Message.error(error || 'Has Error')
                    next(`/login?redirect=${to.path}`)
                    NProgress.done()
                }
            }
        }
    }
    /* has no token*/
    else {
        // 白名单
        if (whiteList.indexOf(to.path) !== -1) {
            // in the free login whitelist, go directly
            next()
        }
        // 需要登录后才能访问的资源URL
        else if (to.path.indexOf(mustHasTokenList) !== -1) {
            // other pages that do not have permission to access are redirected to the login page.
            next(`/login?redirect=${to.path}`)
            NProgress.done()
        }
        // still next
        else {
            next()
            NProgress.done()
        }
    }
})

router.afterEach(() => {
    // finish progress bar
    NProgress.done()
})
